[1]}, [2]} proposed a method which integrates the global model with multiple local models on top of SLIM [3]} and SVD [4]}. Let \(M^{\text{global}}(\mathbf {R}; \theta ^{(g)})\)  denote the global model.
\(\mathbf {\hat{R}} = \alpha M^{\text{global}}(\mathbf {R}; \theta ^{(g)}) + (1 - \alpha )\sum _{j=1}^{q}{\mathbf {T}^{(j)} \odot M^{\text{local}}(\mathbf {R}; \theta ^{(j)}) \oslash \mathbf {T}},\) 
